Road grader attachment



P c. B. SCHEFFOLD 1,877,365

ROAD GRADER ATTACHMENT Filed Feb. 8, 1932 4 Sheets-Sheet l I nvenior flllomey p 1932- c. B. SCHEFFOLD 1,877,365

ROAD GRADER ATTACHMENT Filed Feb. 8,-1932 4 Sheets-Sheet 2 flamaaih Sept. 13, 1932. c. B. SCHEFFOLD 7,

ROAD GRADER ATTACHMENT Fild Feb. 8, 1952 4 Sheets-Sheet 5 Inventor p 13, 1932- c. B. SCHEFFOLD 1,877,365

: ROAD GRADER ATTACHMENT I Filed Feb. 8, 1932 4 Sheets-Sheet 4 lllllllllllll Patented Sept. 13, 1932 UNITED STATES PATEN FI F CARL B. SGHEFFOLD, QIE IEARQUIS, SASKATCHEWAN, CANADA norm GRAD'ER ATTACHMENT Application and February tional road grader which enables accurate work'ofthe character described to be done in conditions Where the material of which theslope is composed is either wet, muddy or lumpy, in which condition the use of picks and shovels, and other means would be in-. .efiective. p

It is also an object of this inventionto provide an attachment of the type described which does not involve alterations to the conventional road grader structure beyond the making of several bolt holes and otherminor changesin parts of the grader and its existing blade.

Other objects and advantages of the invention will be apparent during the course of the following description. In the accompanying drawings forming a part ofthis application and in which like numerals are employed to designate like parts throughout the same,

. Figure 1 is a rear view of a conventional road grader showing the attachment of the invention installed in operative position.

Figure 2 is a view similarto Figure 1 slightly enlarged and showing the attachment of the invention in inoperative position.

Figure 3 is a top plan view. a j v Figure 4 is a side elevational viewof a guide bracket mounting the attachment to the grader.

Figure 5 shows a shield used on theblade of the attachment.

Figure 6 shows a chain employed to support the attachment in inoperative position.

Figure 7 is a horizontal sectional view 50 taken through the blade'of the grader and the s, 1932. Serial No. 591,696.

blade of theattachment' at the level of the guide bracket. f f Figure 8 shows'a group of parts associated with the guide bracket." i .1

Figure 9 is a vertical sectional View of the anchorage of the cable and turn buckle structure shown in Figure 10 which forms the draft cable connection to the frame of the graden. i i

. igure 10 structure. I

shows the turn buckle of the cable Figure 11 is asectional elevational viewof the adjust able rocker arm. i

Figure l2is-a top plan view of-Figure 11 Figure 13 isa'transverse'vertical sectional view through thetrip latch structure of the 1 rocker arm takenthrou gh the left hand por:

tion of Figure 11. H I

Figure 14: is a top plan viewfof a bracket mounted on the gradercircle for mounting theinward end ofthe rocker arm.

Referring in detail to the drawings, the numeral 5 generally designates a conventional grader which has the conventional-grader blade 6, provided with the usual horizontal angleiron brace 7 on the'back thereof. Upon the outward end of this angleiron and attached by vertical b'olts passedtherethrough,

I provide a guide bracket. generally designated 8 which is of the form shown in Figure 4 providing a horizontal portion 9 through which the attaching bolts are passed, and the vertically enlarged portion 10 which extends outwardly overthe end of the angle iron brace I 7, and whichis provided with the transverse ly elongated guide slot 11. This guide bracket 8 pivotally and slidablyreceivesa pivot member 12' to bedescribed. Anotherbracketshown in Figure 14 and designated 13 consists of a vertically disposed plate 14 attachable to the side of an upper portion of'the' grader blade circle,has a pair of parallelly spaced vertical, "laterally projec'ting arms 15, 16,"which are transversely bored to receive the pivot 17 carrying the inward end of the rocker arm as seen in Figure 11. The bracket 13 is mounted on the upper portion of the grader blade supporting circle 18 of the g'r'ader'as shown in Figure 3;

As seen in the drawings the sloper blade of the attachment of my invention consists of a conventional blade construction of elongated generally rectangular form which is provided at its inward end with an inverted triangular formation 19 to the back of which is attached an upwardly projecting standard 20, the standard 20, and the blade itself being pierced and the two of them secured together by bolts. In the drawings the blade of the attachment is generally designated 21. From a point near the upper end of the standard 20 and angularly and downwardly directed brace 22 extends to a ward end of the back of the blade 21. The space between the brace 22 and the upper edge of. the blade 21is covered by a shield 24 held bycleats 25 seen in detail in Figure? At the inward extremity of the triangular portion 19 there is attached a short chain 26 having .a hook 27 for engaging over the upper edge of the grader blade 6 so asto" prevent over tilting of the attachment when it is V 5 illustrated also in Figure 2.

brought into inoperative position. This is Of course, it is understood that the blade 21 is attached at the end portion of the blade 6 in co extensive overlapping manner. The means of connection to the'blade G takes the form of .the pivot member 12 passed, through the end portion of the blade 6 'through'the blade 21, through the standard. 20, then through the slot 11in the bracket. 8, the portion 10 of the bracket being spaced from blade :6. On: the pivot member 12 is a sleeve128 which takes the vertical play from this arrangement in the slot .11, and on the rearward end of the pivot member 12is secured a collar .29 locked on the pivot member by means of a transverse bolt .30 passing through a bore 31 in the rearward end of the pivot member 12. For raising and lowering-the attachment of the invention'there is provided a. rocker arm generally designated 32 which may consistof a tubular shaft 33 provided at its outer end with athickened portion 34 which is interiorly screw-threaded as indicated at 35 to receive a screw-threaded shank 36 which has at lts outward end' a swivel member 37 one section 38 of which is connected to the upper end of the standard 20, the member 38 being of clevis formation, and is so secured by means of a pivot 39' passing through the up: per end of the standard 20. An oiler, such 1 as a grease cup or the like 40 isfprovided to extend through the side of the tubular member 33in the position shown in Figure .11. The inward end portion of the tubular member 33 is equipp'edwith a U-shaped casing 40 whose disposition'is shown in Figure 13, and

which is secured by means of a transverse bolt 41 to the'sald end portion, which permits it to swing away therefrom. The end of the easing 40 opposite the attachment bolt 41 is adapted to merge into a block 42 which has parallel arms extended therefrom as indipoint 23 near the outthe block 42 retains'the lever normally in operative position when the joint is closed Inspection of Figure 2 will disclose the motion or movement ofthe rocker arm structure which brings the blade of the attachment from the operative to inoperative position, and Figure; 1 illustrates the operative posi:

tion of the blade of the attachment as the result of closing the joint in the rocker. arm.

.For adjusting the operative angularity of the attachment, the threaded shaft 36 is to be rotated by engaging the member '37 with a rotatingmea ns soas to extend or retract the member 36 from the'tubular member 33. The

bracket 13 carries a cha in"47which has a.

clevis- 48. at one end for attaching it to the bracket 13 and a hook 49at the other end for engaging in a hole in the flange ofthe member 37 as shown in Figure 2 so'as to maintain the inoperative position of the attachment.

- Thedraft cable'50 shown particularly well forward part ofthe grader frame and to an eye 52 securedvto project from the forward side of the attachment blade 21 shown in detail in Figure 9 and Figure 10. 'FigurelO reveals the provision of a turn buckle 53-for properly tightening the draw cable 50. As shown in Figure 3, the blade'of the grader and consequently the blade of, the attache 'in Figure 3 is'attached to .a bracket 51'at the v V ment will not be disposed inoperative-post tion at. a right angle laterally ofv the grader, but will have a slightly backward deviation.

, In operation, the attachment being in place and adjusted to the desired vertical angularity, the grader is moved forwardly as in ordinary grading work, and close to the side of the road desired to be banked or'sloped, .andthe result will be a smooth perfectly formed slope, the operationbeing accor'nplishedeither simultaneously with grading the road-bed oriasa separate operation, In either case saving a great deal-in labor and makin'gpossible a more efficient and satisfactory slope or bank. It will be observed that the slight relative movement of the blade of theattachment with the blade of thegrader is taken care of by the elongation oftheslot 11 in the guide bracket. Of course, the operation of the lever 45 so as to break the joint willena-ble the movement of the attachment out of'the operative position shown in Figure 1 to. the inoperative position shownin Fig-f ure 2 whereupon. the chain 47 is engaged "with i r the rocker arm to maintain the position of the attachment. This will bring the attachment safely out of operative position and permit movement of the grader as desired. when meeting obstacles or when it is desired to suspend operation of the device or attachment. The construction is such as to provide adequate strength and mechanical efli ciency.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred embodiment of the I same, and that various changes in the shape,

size and arrangement of parts may be re sorted to, without departing from the spirit of my invention or the scope of the subjoined claims,

WVhat is claimed is 1. An attachment for a road grader comprising, in combination, a conventional road grader having a circle carryinga road surfacing blade, a sloping blade mounted to extend from the outward end of the grader blade, adjustable means connected between the inward end portion of the sloping blade and the circle of the grader for supporting a the sloping blade at a desired adjusted angle with the horizontal, and a draft means connected between the outer end portion of the sloping blade and a forepart of the grader.

2. An attachment for a road grader comprising, in combination, a conventional road grader having a circle carrying a road surfacing blade, a sloping blade mounted to extend from the outward end of the grader blade, adjustable means connected between the inward portion of the sloping blade and the circle of the grader for supporting the slopingblade at a desired adjusted angle being pivotally mounted on the outward end portion of the grader blade.

4. A road grader comprising a grader structure including grader blade supporting circle and grader blade carried thereby, a slope forming blade pivotally mounted on one end of the grader blade, draft means connected between the outer end portion of the slope forming blade and a forward part of the grader, and means for adjusting and maintaining the angularity of the slope with the horizontal, and a draft means connected between the outer end portion of the sloping blade and a forepart of the grader, said adjustable means consisting of a longitudinally adjustable arm having a hinged joint therein, and means thereon to break the joint so as to swing the sloping blade out of ground engaging position.

3. An attachment for a road grader comprising, in combination, a conventional road grader having a circle carrying a road surfacing blade, a sloping blade mounted to extend in longitudinal alignment from the outward end of the grader blade, adjustable extensible means connected between the inward end of the sloping blade and the circle of the grader for supporting the sloping blade at a desired adjusted angle with the horizontal, and a draft means connected between the outer end of the sloping blade and a forepart of the grader, said adjustable extensible means consisting of a longitudinally adjustable arm having a hinged joint therein, and means thereon to break the joint so as to swing the sloping blade out of ground engaging position, said sloping blade 

